获取应用版本号，版本名称，包名，AppName，图标，是否是系统应用，获取手机中所有应用，所有进程

PackageManager packageManager = getPackageManager();

PackageInfo packageInfo; = packageManager.getPackageInfo("com.kimliu.mobilesafe", 0);

Drawable icon = packageInfo.applicationInfo.loadIcon(packageManager);
String packageName = packageInfo.packageName;
String AppName = packageInfo.applicationInfo.loadLabel(packageManager).toString();

int versionCode = packageInfo.versionCode;
String versionName = packageInfo.versionName;

原文：http://www.cnblogs.com/kim-liu/p/7401666.html